Employees of fast food restaurants need to sign labor contracts. If the employer fails to sign a labor contract with the employee for more than one month, the employee may ask the employer to pay double wages.

People's Republic of China (PRC) labor contract law

Article 2 This Law is applicable to enterprises, individual economic organizations, private non-enterprise units and other organizations (hereinafter referred to as employers) in People's Republic of China (PRC) to establish labor relations with laborers and conclude, perform, modify, dissolve or terminate labor contracts.

State organs, institutions, social organizations and laborers who have established labor relations with them shall conclude, perform, modify, dissolve or terminate labor contracts in accordance with this Law.

Article 82 If an employer fails to conclude a written labor contract with the employee for more than one month but less than one year from the date of employment, it shall pay the employee twice the monthly salary.

Where an employing unit violates the provisions of this Law and fails to conclude an open-ended labor contract with the laborer, it shall pay the laborer twice the salary every month from the date when the open-ended labor contract should be concluded.